Just tossing an idea out there; what if time has more than one dimension? I haven't looked at the physics of it (it's way beyond me at this point), but maybe there are two time dimensions, kind of like a plane. Then, our particular world lines could be travelling at any number of angles to the, let's call it "upward" flow of time. At first glance, this might help solve many time travel paradoxes, without resorting to infinite universes.
Any comments?
Any comments?